I have been nest user for years and added a heat pump. I did get it working but I had to use the sub optimal setting because the intelligent heat pump range does now allow for cold climate heat pump that goes to -30 C. The software limit for heat pump needs to be adjusted or specify a cold climate heat pump.
my work around causes more aux heat usage and not able to use the heat pump settings like how many hours to warm up.
@Stepheng, just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, we would be happy to keep it open. If there's more we can do, just let us know.
I appreciate the help, HP660, Jenelyn and Archie.